Compute the payback period for each of these two separate Investments: a. A new operating system for an existing machine is expected to cost $270,000 and have a useful life of six years. The system yields an incremental after-tax income of $77,884 each year after deducting its straight-line depreciation. The predicted salvage value of the system is $10,000 b. A machine costs $210,000, has a $14.000 salvage value, is expected to last seven years, and will generate an after-tax income of $43,000 per year after straight-line depreciation Payback Period 1 Choose Denominator: Choose Numerator: Payback Period = Payback period a b